Skip to main content
U.S. flag

An official website of the United States government

Paleomagnetic results from the Shasta Bally Plutonic Belt in the Klamath Mountains Province, northern California

January 1, 1988

Available paleomagnetic data show approximately 100° of clockwise rotation for Permian and Triassic strata of the Eastern Klamath terrane. Jurassic strata of this terrane are rotated approximately 60° clockwise, which is comparable to rotations reported for Jurassic plutons that occur elsewhere in the Klamath Mountains province. Paleomagnetic data obtained during the present study from the Shasta Bally belt of Cretaceous plutons indicate 25.7° ± 13.6° of clockwise rotation for the province since Early Cretaceous time (≃ 136 Ma). The waning stages of rotation at the time of emplacement of the Shasta Bally belt plutons, which was closely followed by deposition of basal strata (Lower Cretaceous) of the Great Valley sequence, probably represents completion of accretion of the province to cratonic North America.

Citation Information

Publication Year 1988
Title Paleomagnetic results from the Shasta Bally Plutonic Belt in the Klamath Mountains Province, northern California
DOI 10.1029/GL015i001p00056
Authors Edward A. Mankinen, William P. Irwin, C. Sherman Gromme
Publication Type Article
Publication Subtype Journal Article
Series Title Geophysical Research Letters
Series Number
Index ID 70197161
Record Source USGS Publications Warehouse
USGS Organization Geology, Minerals, Energy, and Geophysics Science Center